LLVM/project 554347bllvm/include/llvm/Support Mustache.h, llvm/lib/Support Mustache.cpp CMakeLists.txt

Revert "[llvm] add support for mustache templating language (#105893)" (#130873)

This patch caused certain GCC buildbots to failed
errors: https://lab.llvm.org/buildbot/#/builders/66/builds/11049
DeltaFile
+0-1,226llvm/unittests/Support/MustacheTest.cpp
+0-793llvm/lib/Support/Mustache.cpp
+0-127llvm/include/llvm/Support/Mustache.h
+0-1llvm/lib/Support/CMakeLists.txt
+0-1llvm/unittests/Support/CMakeLists.txt
+0-2,1485 files

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