Revert "Clean environment variables to account for sandbox work directory."

This reverts commit 0af8ea14fc950d1121260dc6c02fa9a5b0ceb77d.

Reason for revert: <Droidmonitor created revert due to b/363848580. Will be verifying through ABTD before submission.>

Change-Id: Iafba28897ad27df67ef8ae8904454196c482216d
diff --git a/ui/build/sandbox_linux.go b/ui/build/sandbox_linux.go
index 6c46000..d9ca854 100644
--- a/ui/build/sandbox_linux.go
+++ b/ui/build/sandbox_linux.go
@@ -187,17 +187,8 @@
 	return args
 }
 
-func (c *Cmd) workDir() string {
-	if !c.config.UseABFS() {
-		wd, _ := os.Getwd()
-		return wd
-	}
-
-	return abfsSrcDir
-}
-
 func (c *Cmd) wrapSandbox() {
-	wd := c.workDir()
+	wd, _ := os.Getwd()
 
 	var sandboxArgs []string
 	sandboxArgs = append(sandboxArgs,
@@ -235,7 +226,7 @@
 	)
 
 	sandboxArgs = append(sandboxArgs,
-		c.readMountArgs()...,
+		c.readMountArgs()...
 	)
 
 	sandboxArgs = append(sandboxArgs,