ci: drop the cmake patch for linux

hopefully they've solved the polly plugin thing by now on apt.llvm.org.

ci/azure/linux_script

@@ -28,22 +28,6 @@ PATH=$PWD/$WASMTIME:$PATH
 # This will affect the cmake command below.
 git config core.abbrev 9
 
-# This patch is a workaround for
-# https://bugs.llvm.org/show_bug.cgi?id=44870 / https://github.com/llvm/llvm-project/issues/191
-# It only applies to the apt.llvm.org packages.
-patch <<'END_PATCH'
---- CMakeLists.txt
-+++ CMakeLists.txt
-@@ -369,6 +369,7 @@ target_link_libraries(zig_cpp LINK_PUBLIC
-     ${CLANG_LIBRARIES}
-     ${LLD_LIBRARIES}
-     ${LLVM_LIBRARIES}
-+    "-Wl,/usr/lib/llvm-10/lib/LLVMPolly.so"
- )
- 
- add_library(opt_c_util STATIC ${OPTIMIZED_C_SOURCES})
-END_PATCH
-
 export CC=gcc-7
 export CXX=g++-7
 mkdir build