RFR(s): 8205131: remove Runtime trace methods

[Stuart Marks]

Hi all,

Please review this changeset and CSR request that remove the traceInstructions() 
and traceMethodCalls() methods from java.lang.Runtime. These methods have been 
deprecated for removal since Java 9, and they do nothing. I've also removed a 
couple mentions of these methods from some tests.

After this changeset, the only times these methods are mentioned is in javac's 
symbol tables (for example, make/data/symbols/java.base-9.sym.txt) where they 
are kept because they are present in earlier releases.

They are also mentioned in the file

     test/hotspot/jtreg/runtime/appcds/ExtraSymbols.symbols.txt

However, this file has a comment

> 68 -1: # The values in this file are only used for testing the operation of
> 63 -1: # adding extra symbols into the CDS archive. None of the values
> 70 -1: # are interpreted in any way. So even if they contain names of classes
> 70 -1: # that have been renamed or removed, or string literals that have been
> 66 -1: # changed or remove from Java source code, it would not affect the
> 26 -1: # correctness of the test.

so it seems that leaving mention of these methods in this file is harmless. 
Based on this comment I've decided not to change this file. Nonetheless, I'm 
including hotspot-dev in this review to make sure this is ok. (I seem to recall 
a similar issue came up the last time I removed something.)

Bug:

	https://bugs.openjdk.java.net/browse/JDK-8205131

Webrev:

	http://cr.openjdk.java.net/~smarks/reviews/8205131/webrev.0/

CSR request:

	https://bugs.openjdk.java.net/browse/JDK-8225330
	(if you review, please edit this issue and add yourself to the
	Reviewed By field)

Thanks,

s'marks