diff --git a/src/pip/_internal/legacy_resolve.py b/src/pip/_internal/legacy_resolve.py
index ca269121b60..d05a4c063a0 100644
--- a/src/pip/_internal/legacy_resolve.py
+++ b/src/pip/_internal/legacy_resolve.py
@@ -327,9 +327,6 @@ def _resolve_one(
 
         req_to_install.prepared = True
 
-        # register tmp src for cleanup in case something goes wrong
-        requirement_set.reqs_to_cleanup.append(req_to_install)
-
         abstract_dist = self._get_abstract_dist_for(req_to_install)
 
         # Parse and return dependencies
diff --git a/src/pip/_internal/req/req_set.py b/src/pip/_internal/req/req_set.py
index 15d10007349..df5fbee08dc 100644
--- a/src/pip/_internal/req/req_set.py
+++ b/src/pip/_internal/req/req_set.py
@@ -33,7 +33,6 @@ def __init__(self, check_supported_wheels=True):
 
         self.unnamed_requirements = []  # type: List[InstallRequirement]
         self.successfully_downloaded = []  # type: List[InstallRequirement]
-        self.reqs_to_cleanup = []  # type: List[InstallRequirement]
 
     def __str__(self):
         # type: () -> str
@@ -161,7 +160,6 @@ def add_requirement(
             )
         )
         if does_not_satisfy_constraint:
-            self.reqs_to_cleanup.append(install_req)
             raise InstallationError(
                 "Could not satisfy constraints for '{}': "
                 "installation from path or url cannot be "