drop %ghc_compiler to avoid srpm problems in koji etc

ghc-rpm-macros.ghc

@@ -66,8 +66,6 @@ done\
 # compiler version
 %ghc_version %{!?ghc_version_override:%(ghc --numeric-version)}%{?ghc_version_override}
 
-%ghc_compiler ghc-compiler = %{ghc_version}
-
 # create and install package.conf file
 # cabal_pkg_conf [name] [version]
 %cabal_pkg_conf()\

ghc-rpm-macros.ghc-extra

@@ -65,9 +65,9 @@ Summary:        %{?common_summary}%{!?common_summary:Haskell %{pkgname} library}
 %{nil}
 
 # devel pkg basic requires
-%ghc_devel_requires Requires:       %{ghc_compiler}\
+%ghc_devel_requires Requires:       ghc-compiler = %{ghc_version}\
-Requires(post): %{ghc_compiler}\
+Requires(post): ghc-compiler = %{ghc_version}\
-Requires(postun): %{ghc_compiler}\
+Requires(postun): ghc-compiler = %{ghc_version}\
 Requires:       ghc-%{?pkg_name}%{!?pkg_name:%{pkgname}} = %{?pkgver}%{!?pkgver:%{version}}-%{release}
 
 # ghc_devel_package [-c cdepslist] [-h pkgdepslist] [-l licensetag] [-m] [name] [version]