Fix install command following the removal of the --develop option

poetry/console/commands/install.py

@@ -57,7 +57,6 @@ exist it will look for <comment>pyproject.toml</> and do the same.
 
         installer.extras(extras)
         installer.dev_mode(not self.option("no-dev"))
-        installer.develop(self.option("develop"))
         installer.dry_run(self.option("dry-run"))
         installer.verbose(self.option("verbose"))
 

poetry/installation/installer.py

@@ -43,7 +43,6 @@ class Installer:
         self._verbose = False
         self._write_lock = True
         self._dev_mode = True
-        self._develop = []
         self._execute_operations = True
         self._lock = False
 
@@ -100,11 +99,6 @@ class Installer:
     def is_dev_mode(self):  # type: () -> bool
         return self._dev_mode
 
-    def develop(self, packages):  # type: (dict) -> Installer
-        self._develop = [canonicalize_name(p) for p in packages]
-
-        return self
-
     def update(self, update=True):  # type: (bool) -> Installer
         self._update = update
 
@@ -445,11 +439,6 @@ class Installer:
             if op.job_type == "uninstall":
                 continue
 
-            if package.name in self._develop and package.source_type == "directory":
-                package.develop = True
-                if op.skipped:
-                    op.unskip()
-
             current_python = parse_constraint(
                 ".".join(str(v) for v in self._env.version_info[:3])
             )