Backed out changeset 9d40b66a9202 (bug 1784202) for causing build bus…

…tages.

taskcluster/ci/fetch/toolchains.yml

@@ -353,13 +353,6 @@ clang-14:
         repo: https://github.com/llvm/llvm-project
         revision: 4bc1d0b51c8e488d78ab69c8b19cfbcd1f7db6a4
 
-clang-15:
-    description: clang 15.0.0 source code
-    fetch:
-        type: git
-        repo: https://github.com/llvm/llvm-project
-        revision: 4ba6a9c9f65bbc8bd06e3652cb20fd4dfc846137
-
 clang-trunk:
     description: clang main branch source code
     attributes:

taskcluster/ci/toolchain/clang-tidy.yml

@@ -23,7 +23,7 @@ job-defaults:
             - 'build/build-clang/build-clang.py'
     fetches:
         fetch:
-            - clang-15
+            - clang-14
 
 linux64-clang-tidy:
     index:
@@ -38,7 +38,7 @@ linux64-clang-tidy:
             - 'build/build-clang/clang-tidy-linux64.json'
     fetches:
         toolchain:
-            - linux64-clang-15
+            - linux64-clang-14
             - linux64-toolchain-sysroot
 
 macosx64-clang-tidy:
@@ -56,7 +56,7 @@ macosx64-clang-tidy:
     fetches:
         toolchain:
             - linux64-cctools-port
-            - linux64-clang-15
+            - linux64-clang-14
             - macosx64-sdk
 
 macosx64-arch64-clang-tidy:
@@ -77,7 +77,7 @@ macosx64-arch64-clang-tidy:
     fetches:
         toolchain:
             - linux64-cctools-port
-            - linux64-clang-15
+            - linux64-clang-14
             - macosx64-sdk
 
 win64-clang-tidy:
@@ -127,5 +127,5 @@ linux64-clang-tidy-external:
         fetch:
             - civet-source
         toolchain:
-            - linux64-clang-15
+            - linux64-clang-14
             - linux64-toolchain-sysroot