Remove --keep-agent arg from build:me script

Remove `--keep-agent` argument from `build:me` script definition, to
avoid overwriting `_APPSIGNAL_BUILD_AGENT_PATH` with an empty string.

Author: lipskis

README.md

@@ -91,7 +91,7 @@ hatch run build:for <triple> # for a specific agent triple
 hatch run build:me /path/to/agent
 # or place the desired agent binary at
 # `src/appsignal/appsignal-agent`, and then:
- _APPSIGNAL_BUILD_AGENT_PATH="--keep-agent" hatch run build:me --keep-agent
+ _APPSIGNAL_BUILD_AGENT_PATH="--keep-agent" hatch run build:me
 ```
 
 ### Clean up build artifacts

pyproject.toml

@@ -140,7 +140,7 @@ ignore = [
 
 [tool.hatch.envs.build.scripts]
 all = "python src/scripts/build_all.py"
-me = "_APPSIGNAL_BUILD_AGENT_PATH=\"{args}\" hatch build -t wheel"
+me = "hatch build -t wheel"
 for = "_APPSIGNAL_BUILD_TRIPLE=\"{args}\" hatch build -t wheel"
 
 [tool.hatch.build.targets.wheel.hooks.custom]