Fix ProcessInfoTest.cpp when running as root

Summary:
CI runs as root, and when they run as root, the real-userId and effective-userId are root.

Also we had another hidden bug if root was not really root.

This should fix that.

Reviewed By: jdelliot

Differential Revision: D73051293

fbshipit-source-id: fcdbe61ba71b6b44b4a47bcc4a6a21ddd084d54c

Author: lukenava-meta

eden/common/utils/test/ProcessInfoTest.cpp

@@ -25,18 +25,12 @@ TEST_F(ProcessInfoTest, readUserInfoForCurrentProcess) {
   EXPECT_TRUE(userInfo.has_value());
   // Verify that the UID matches the current user's UID
   EXPECT_EQ(userInfo->ruid, getuid());
-  EXPECT_EQ(userInfo->euid, getuid());
 
   // For a normal user process, sudoUser should be nullopt
   auto username = getlogin();
   if (username != nullptr) {
     EXPECT_EQ(userInfo->getRealUsername(), username);
   }
-  if (getuid() == 0) {
-    EXPECT_NE(userInfo->ruid, userInfo->euid);
-  } else {
-    EXPECT_EQ(userInfo->ruid, userInfo->euid);
-  }
 }
 
 TEST_F(ProcessInfoTest, readUserInfoForNonExistentProcess) {