Remove abi_revision handling

We no longer ship RCs in Fedora, so this is no longer necessary.
This was already done for the llvm package, do it for clang as well.

0001-cmake-Allow-shared-libraries-to-customize-the-soname.patch

@@ -1,39 +0,0 @@
-From 3dc5722d5c7673a879f2b4680369d3ac8b6b64b6 Mon Sep 17 00:00:00 2001
-From: Tom Stellard <tstellar@redhat.com>
-Date: Wed, 4 Aug 2021 14:05:38 -0700
-Subject: [PATCH] cmake: Allow shared libraries to customize the soname using
- LLVM_ABI_REVISION
-
-The LLVM_ABI_REVISION variable is intended to be used for release
-candidates which introduce an ABI change to a shared library.  This
-variable can be specified per library, so there is not one global value
-for all of LLVM.
-
-For example, if we LLVM X.0.0-rc2 introduces an ABI change for a library
-compared with LLVM X.0.0-rc1, then the LLVM_ABI_REVISION number for
-library will be incremented by 1.
-
-In the main branch, LLVM_ABI_REVISION should always be 0, it is only
-meant to be used in the release branch.
-
-Differential Revision: https://reviews.llvm.org/D105594
----
- clang/tools/clang-shlib/CMakeLists.txt | 5 +++++
- 3 files changed, 19 insertions(+), 2 deletions(-)
-
-diff --git a/clang/tools/clang-shlib/CMakeLists.txt b/clang/tools/clang-shlib/CMakeLists.txt
-index 9c1f8ea452b3..4d785924e4bb 100644
---- a/clang/tools/clang-shlib/CMakeLists.txt
-+++ b/clang/tools/clang-shlib/CMakeLists.txt
-@@ -1,3 +1,8 @@
-+# In the main branch, LLVM_ABI_REVISION should always be 0.  In the release
-+# branches, this should be incremented before each release candidate every
-+# time the ABI of libclang-cpp.so changes.
-+set(LLVM_ABI_REVISION 0)
-+
- # Building libclang-cpp.so fails if LLVM_ENABLE_PIC=Off
- if (NOT LLVM_ENABLE_PIC)
-   return()
--- 
-2.27.0
-

clang.spec

@@ -35,10 +35,6 @@
 %global clang_srcdir clang-%{clang_version}%{?rc_ver:rc%{rc_ver}}.src
 %global clang_tools_srcdir clang-tools-extra-%{clang_version}%{?rc_ver:rc%{rc_ver}}.src
 
-%if !%{maj_ver} && 0%{?rc_ver}
-%global abi_revision 2
-%endif
-
 Name:		%pkg_name
 Version:	%{clang_version}%{?rc_ver:~rc%{rc_ver}}
 Release:	3%{?dist}
@@ -62,7 +58,6 @@ Patch0:     0001-PATCH-clang-Reorganize-gtest-integration.patch
 Patch1:     0003-PATCH-Make-funwind-tables-the-default-on-all-archs.patch
 Patch2:     0003-PATCH-clang-Don-t-install-static-libraries.patch
 Patch3:     0001-Driver-Add-a-gcc-equivalent-triple-to-the-list-of-tr.patch
-Patch4:     0001-cmake-Allow-shared-libraries-to-customize-the-soname.patch
 Patch5:     0010-PATCH-clang-Produce-DWARF4-by-default.patch
 Patch6:     0001-Take-into-account-Fedora-Specific-install-dir-for-li.patch
 
@@ -367,7 +362,6 @@ sed -i 's/\@FEDORA_LLVM_LIB_SUFFIX\@//g' test/lit.cfg.py
 	-DLLVM_BUILD_DOCS=ON \
 	-DLLVM_ENABLE_SPHINX=ON \
 	-DCLANG_LINK_CLANG_DYLIB=ON \
-	%{?abi_revision:-DLLVM_ABI_REVISION=%{abi_revision}} \
 	-DSPHINX_WARNINGS_AS_ERRORS=OFF \
 	\
 	-DCLANG_BUILD_EXAMPLES:BOOL=OFF \