Fix _remove to catch EnvCommandError instead of CalledProcessError (#10740)

run_pip() wraps CalledProcessError inside EnvCommandError, so the
except CalledProcessError handler in _remove() was dead code.  If
pip exited non-zero with 'not installed' in its output, the
EnvCommandError would propagate uncaught to _execute_operation,
which treats it as a fatal error and aborts the entire installation.

This matters when removing a package that was already uninstalled
externally — e.g. via pip directly — while Poetry is performing
an update.

Author: bysiber

src/poetry/installation/executor.py

@@ -10,7 +10,6 @@
 from concurrent.futures import ThreadPoolExecutor
 from concurrent.futures import wait
 from pathlib import Path
-from subprocess import CalledProcessError
 from typing import TYPE_CHECKING
 from typing import Any
 
@@ -624,7 +623,7 @@ def _remove(self, package: Package) -> int:
 
         try:
             return self.run_pip("uninstall", package.name, "-y")
-        except CalledProcessError as e:
+        except EnvCommandError as e:
             if "not installed" in str(e):
                 return 0