Remove unneeded public :: operator(==) which causes an error on ifx (#1095)

Author: perazz

src/fpm/git.f90

@@ -6,7 +6,7 @@ module fpm_git
     implicit none
 
     public :: git_target_t, git_target_default, git_target_branch, git_target_tag, git_target_revision, git_revision, &
-            & git_archive, git_matches_manifest, operator(==), compressed_package_name
+            & git_archive, git_matches_manifest, compressed_package_name
 
     !> Name of the compressed package that is generated temporarily.
     character(len=*), parameter :: compressed_package_name = 'compressed_package'