Remove runtime check of NSPR version in NSS_VersionCheck, which seems to
be pointless.

https://bugzilla.mozilla.org/show_bug.cgi?id=542741
diff --git a/mozilla/security/nss/lib/nss/nssinit.c b/mozilla/security/nss/lib/nss/nssinit.c
index f2e3ffb..66be164 100644
--- a/mozilla/security/nss/lib/nss/nssinit.c
+++ b/mozilla/security/nss/lib/nss/nssinit.c
@@ -1198,9 +1198,5 @@ NSS_VersionCheck(const char *importedVersion)
         vpatch == NSS_VPATCH && vbuild > NSS_VBUILD) {
         return PR_FALSE;
     }
-    /* Check dependent libraries */
-    if (PR_VersionCheck(PR_VERSION) == PR_FALSE) {
-        return PR_FALSE;
-    }
     return PR_TRUE;
 }