C1 flags that should have expired are still present

The special flag table lists the following C1 flags, all of which should be obsolete as of JDK 15 and expired in JDK 16:

+#ifndef COMPILER2
+ // These flags were generally available, but are C2 only, now.
+ { "MaxInlineLevel", JDK_Version::undefined(), JDK_Version::jdk(15), JDK_Version::jdk(16) },
+ { "MaxRecursiveInlineLevel", JDK_Version::undefined(), JDK_Version::jdk(15), JDK_Version::jdk(16) },
+ { "InlineSmallCode", JDK_Version::undefined(), JDK_Version::jdk(15), JDK_Version::jdk(16) },
+ { "MaxInlineSize", JDK_Version::undefined(), JDK_Version::jdk(15), JDK_Version::jdk(16) },
+ { "FreqInlineSize", JDK_Version::undefined(), JDK_Version::jdk(15), JDK_Version::jdk(16) },
+ { "MaxTrivialSize", JDK_Version::undefined(), JDK_Version::jdk(15), JDK_Version::jdk(16) },
+#endif

As we are in JDK 16 these flags have in fact all expired and so the entire section should now be deleted.