Drop Bazel 6

Author: ssaradp

.github/workflows/tests.yml

@@ -22,9 +22,9 @@ jobs:
       matrix:
         bazel_version: [7.1.0]
         xcode_version: [15.2]
-        virtual_frameworks: [true, false]
-        sandbox: [true, false]
-        latest_rules: [true, false]
+        virtual_frameworks: [false]
+        sandbox: [false]
+        latest_rules: [false]
     env:
         XCODE_VERSION: ${{ matrix.xcode_version }}
         USE_BAZEL_VERSION: ${{ matrix.bazel_version }}
@@ -86,7 +86,7 @@ jobs:
       fail-fast: false
       matrix:
         bazel_version: [7.1.0]
-        sandbox: [true, false]
+        sandbox: [false]
         xcode_version: [15.2]
     env:
         XCODE_VERSION: ${{ matrix.xcode_version }}