linux-netmodule: Remove redundant find_cfgs function

This function is already present in the cml1 bbclass which is
automatically inherited by the kernel bbclass.

BugzID: 75318

recipes-kernel/linux/linux-netmodule_git.bb

@@ -40,12 +40,3 @@ do_configure_append(){
         ${S}/scripts/kconfig/merge_config.sh -m -O ${WORKDIR}/build ${WORKDIR}/build/.config ${WORKDIR}/*.cfg
     fi
 }
-
-#Apply config fragments
-def find_cfgs(d):
-    sources=src_patches(d, True)
-    sources_list=[]
-    for s in sources:
-        if s.endswith('.cfg'):
-            sources_list.append(s)
-    return sources_list