ignition/msgs/test_config.h has failing include statement

[scpeters]

Environment

• OS Version: Ubuntu 20.04
• Source or binary build? ABI checker CI build

Description

• Expected behavior: ABI checker build should compile all headers successfully
• Actual behavior: ABI checker fails to compile a header

The include/ignition/msgs/test_config.h header file was added in #249, but it redirects to a non-existent header file. I'm guessing that this redirection header should not have been added in the first place?

Steps to reproduce

1. Create a pull request without API/ABI changes targeting gz-msgs9 (such as gz_TEST: one more ign -> gz #301)
2. Observe failure, and view workspace log

Output

In file included from /tmp/suIk835nXK/dump1.h:17:
/usr/local/destination_branch/include/gz/msgs9/ignition/msgs/test_config.h:18:10: fatal error: gz/msgs/test_config.h: No such file or directory
   18 | #include <gz/msgs/test_config.h>
      |          ^~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.

[methylDragon]

In the other libs I'd add a line to

gz-msgs/test/CMakeLists.txt

Line 7 in 8e10c8d

configure_file (test_config.h.in

to also configure a gz version of the test_config file.

Let's do that instead?

[methylDragon]

Correction:
The redirection target was removed as of 7cf04fc , so the current test_config redirection header leads nowhere.

Furthermore, since the prefix was removed in the above commit, there is no need for a redirection header in the first place.

For both of those reasons, let's remove the test_config redirection header.

[scpeters]

ignition/msgs/test_config.h removed in #303