[patch] Remove unused crossjump code

[Jeff Law]

Richard Kenner wrote:
>> This doesn't look familiar to me at all.  I can't even recall a time 
>> when cross jumping ran prior to reload.    
>>     
>
> My memory could well be wrong, but I'm pretty sure that it originally
> ran twice, once before reload and once after.
>   
I wasn't able to find any evidence that we cross-jumped prior to reload 
-- I guess it's possible we had such code in the gcc2 development tree, 
but it didn't make it into the gcc2.0 release.

We did run cross-jumping twice -- but they were both after reload -- the 
second one was to deal with the code inserted by reg-stack.

Jeff