Removed unused AthenaYamplTool

AthenaYamplTool was originally developed as a potential alternative to AthenaSharedMemoryTool, but it has never been used since that.

This commit serves a dual purpose: code cleanup and a step towards fixing ATEAM-868

This merge request affects 1 package:

• Control/AthenaIPCTools

This merge request affects 3 files:

• Control/AthenaIPCTools/src/AthenaYamplTool.cxx
• Control/AthenaIPCTools/src/AthenaYamplTool.h
• Control/AthenaIPCTools/src/components/AthenaIPCTools_entries.cxx

Adding @ssnyder as watcher

added Core master review-pending-level-1 labels

CI Result SUCCESS (hash ec76f329)

	Athena
externals
cmake
make
tests

Full details available on this CI monitor view. Check the JIRA CI status board for known problems
Athena: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 63160]

removed review-pending-level-1 label

added review-approved label

merged

mentioned in commit 4c8780aa

added sweep:ignore label