diff --git a/.github/workflows/release-gitflow.yml b/.github/workflows/release-gitflow.yml
index 282e45ebbd1..569542b8cf5 100644
--- a/.github/workflows/release-gitflow.yml
+++ b/.github/workflows/release-gitflow.yml
@@ -49,9 +49,6 @@ jobs:
                   git checkout develop
                   git merge -X ours master
 
-            - name: Run post-merge-master script to revert package.json fields
-              run: ./.action-repo/scripts/release/post-merge-master.sh
-
             - name: Reset dependencies
               if: inputs.dependencies
               run: |
diff --git a/.github/workflows/release-make.yml b/.github/workflows/release-make.yml
index 38745231602..2900ade4231 100644
--- a/.github/workflows/release-make.yml
+++ b/.github/workflows/release-make.yml
@@ -158,11 +158,6 @@ jobs:
               env:
                   RELEASE_NOTES: ${{ steps.draft-release.outputs.body }}
 
-            - name: Run pre-release script to update package.json fields
-              run: |
-                  ./.action-repo/scripts/release/pre-release.sh
-                  git add package.json
-
             - name: Commit changes
               run: git commit -m "$VERSION"
 
diff --git a/.github/workflows/static_analysis.yml b/.github/workflows/static_analysis.yml
index a0afd01863c..7c3be28e614 100644
--- a/.github/workflows/static_analysis.yml
+++ b/.github/workflows/static_analysis.yml
@@ -26,16 +26,6 @@ jobs:
             - name: Typecheck
               run: "yarn run lint:types"
 
-            - name: Switch js-sdk to release mode
-              run: |
-                  scripts/switch_package_to_release.js
-                  yarn install
-                  yarn run build:compile
-                  yarn run build:types
-
-            - name: Typecheck (release mode)
-              run: "yarn run lint:types"
-
     js_lint:
         name: "ESLint"
         runs-on: ubuntu-24.04
diff --git a/scripts/release/post-merge-master.sh b/scripts/release/post-merge-master.sh
deleted file mode 100755
index e76d6422111..00000000000
--- a/scripts/release/post-merge-master.sh
+++ /dev/null
@@ -1,22 +0,0 @@
-#!/bin/bash
-
-# When merging to develop, we need revert the `main` and `typings` fields if we adjusted them previously.
-for i in main typings browser
-do
-    # If a `lib` prefixed value is present, it means we adjusted the field earlier at publish time, so we should revert it now.
-    if [ "$(jq -r ".matrix_lib_$i" package.json)" != "null" ]; then
-        # If there's a `src` prefixed value, use that, otherwise delete.
-        # This is used to delete the `typings` field and reset `main` back to the TypeScript source.
-        src_value=$(jq -r ".matrix_src_$i" package.json)
-        if [ "$src_value" != "null" ]; then
-            jq ".$i = .matrix_src_$i" package.json > package.json.new && mv package.json.new package.json && yarn prettier --write package.json
-        else
-            jq "del(.$i)" package.json > package.json.new && mv package.json.new package.json && yarn prettier --write package.json
-        fi
-    fi
-done
-
-if [ -n "$(git ls-files --modified package.json)" ]; then
-    echo "Committing develop package.json"
-    git commit package.json -m "Resetting package fields for development"
-fi
diff --git a/scripts/release/pre-release.sh b/scripts/release/pre-release.sh
deleted file mode 100755
index 6b47ef180ff..00000000000
--- a/scripts/release/pre-release.sh
+++ /dev/null
@@ -1,14 +0,0 @@
-#!/bin/bash
-
-# For the published and dist versions of the package,
-# we copy the `matrix_lib_main` and `matrix_lib_typings` fields to `main` and `typings` (if they exist).
-# This small bit of gymnastics allows us to use the TypeScript source directly for development without
-# needing to build before linting or testing.
-
-for i in main typings browser
-do
-    lib_value=$(jq -r ".matrix_lib_$i" package.json)
-    if [ "$lib_value" != "null" ]; then
-        jq ".$i = .matrix_lib_$i" package.json > package.json.new && mv package.json.new package.json && yarn prettier --write package.json
-    fi
-done
diff --git a/scripts/switch_package_to_release.cjs b/scripts/switch_package_to_release.cjs
deleted file mode 100755
index 6d857a4070a..00000000000
--- a/scripts/switch_package_to_release.cjs
+++ /dev/null
@@ -1,18 +0,0 @@
-#!/usr/bin/env node
-
-const fsProm = require("fs/promises");
-
-const PKGJSON = "package.json";
-
-async function main() {
-    const pkgJson = JSON.parse(await fsProm.readFile(PKGJSON, "utf8"));
-    for (const field of ["main", "typings"]) {
-        if (pkgJson["matrix_lib_" + field] !== undefined) {
-            pkgJson[field] = pkgJson["matrix_lib_" + field];
-        }
-    }
-
-    await fsProm.writeFile(PKGJSON, JSON.stringify(pkgJson, null, 2));
-}
-
-main();
diff --git a/scripts/switch_package_to_release.js b/scripts/switch_package_to_release.js
deleted file mode 120000
index 27f1619c9a2..00000000000
--- a/scripts/switch_package_to_release.js
+++ /dev/null
@@ -1 +0,0 @@
-switch_package_to_release.cjs
\ No newline at end of file