cmake REFACTOR redundant library name

The "lib" prefix and ".a" suffix are
added as needed and based on the platform.
diff --git a/CMakeModules/FindPCRE2.cmake b/CMakeModules/FindPCRE2.cmake
index bb44f78..a05d998 100644
--- a/CMakeModules/FindPCRE2.cmake
+++ b/CMakeModules/FindPCRE2.cmake
@@ -28,7 +28,6 @@
     else()
         find_library(PCRE2_LIBRARY
             NAMES
-            libpcre2.a
             pcre2-8
             PATHS
             /usr/lib