refactor: comply with mypy `truthy-bool`

src/poetry/console/commands/init.py

@@ -418,7 +418,7 @@ You can specify a package in the following forms:
         return [
             parse_dependency_specification(
                 requirement=requirement,
-                env=self.env if isinstance(self, EnvCommand) and self.env else None,
+                env=self.env if isinstance(self, EnvCommand) else None,
                 cwd=cwd,
             )
             for requirement in requirements

src/poetry/inspection/info.py

@@ -424,10 +424,7 @@ class PackageInfo:
             except ValueError:
                 return None
 
-        info = cls._from_distribution(dist=dist)
-        if info:
-            return info
-        return None
+        return cls._from_distribution(dist=dist)
 
     @classmethod
     def from_package(cls, package: Package) -> PackageInfo:
@@ -491,7 +488,6 @@ class PackageInfo:
 
                     # we discovered PkgInfo but no requirements were listed
 
-        assert info
         info._source_type = "directory"
         info._source_url = path.as_posix()