Remove leftover workaround (#57306)

Author: AhmedAlaa4611

.github/workflows/tests.yml

@@ -76,15 +76,6 @@ jobs:
       - name: Set Framework version
         run: composer config version "12.x-dev"
 
-      - name: Set Minimum dependencies for `prefer-lowest`
-        uses: nick-fields/retry@v3
-        with:
-          timeout_minutes: 5
-          max_attempts: 5
-          command: composer require opis/string:2.0.1 --no-interaction --no-update
-          shell: bash
-        if: matrix.stability == 'prefer-lowest'
-
       - name: Install dependencies
         uses: nick-fields/retry@v3
         with:
@@ -154,15 +145,6 @@ jobs:
       - name: Set Framework version
         run: composer config version "12.x-dev"
 
-      - name: Set Minimum dependencies for `prefer-lowest`
-        uses: nick-fields/retry@v3
-        with:
-          timeout_minutes: 5
-          max_attempts: 5
-          command: composer require opis/string:2.0.1 --no-interaction --no-update
-          shell: bash
-        if: matrix.stability == 'prefer-lowest'
-
       - name: Install dependencies
         uses: nick-fields/retry@v3
         with: