Stepping down as gcov maintainer and callgraph reviewer

[Jeff Law]

On 2/17/23 09:18, Aldy Hernandez via Gcc wrote:
> Woah.  Sad to see you leave!
Definitely a sad day, both for the project and for me personally.

> 
> It's always been a pleasure to work with you.
> 
> Thanks for all the great work, and good luck on your next endeavors.
Likewise.  And if you want to come back to GCC development, you'll 
always be welcome Martin!

jeff