fix more truthy-bool mypy warnings

src/poetry/console/commands/init.py

@@ -126,7 +126,7 @@ The <c1>init</c1> command creates a basic <comment>pyproject.toml</> file in the
         description = self.ask(question)
 
         author = self.option("author")
-        if not author and vcs_config and vcs_config.get("user.name"):
+        if not author and vcs_config.get("user.name"):
             author = vcs_config["user.name"]
             author_email = vcs_config.get("user.email")
             if author_email:

src/poetry/console/commands/show.py

@@ -524,7 +524,7 @@ lists all packages available."""
 
         constraint = parse_constraint("^" + package.pretty_version)
 
-        if latest.version and constraint.allows(latest.version):
+        if constraint.allows(latest.version):
             # It needs an immediate semver-compliant upgrade
             return "semver-safe-update"
 

src/poetry/repositories/pypi_repository.py

@@ -88,7 +88,7 @@ class PyPiRepository(HTTPRepository):
                     ignored_pre_release_packages.append(package)
                 continue
 
-            if not constraint or (constraint and constraint.allows(package.version)):
+            if constraint.allows(package.version):
                 packages.append(package)
 
         self._log(

src/poetry/utils/env.py

@@ -289,7 +289,7 @@ class SitePackages:
                 f"{path} is not relative to any discovered {site_type}sites"
             )
 
-        results = [candidate / path for candidate in candidates if candidate]
+        results = [candidate / path for candidate in candidates]
 
         if not results and strict:
             raise RuntimeError(