Revert "Set preprocessor symbols for internal builds."

This reverts commit a91056c5e1.

Signal.xcodeproj/project.pbxproj

@@ -3196,7 +3196,6 @@
 					"DEBUG=1",
 					"$(inherited)",
 					HAVE_CONFIG_H,
-					"INTERNAL=1",
 				);
 				GCC_STRICT_ALIASING = NO;
 				GCC_WARN_MULTIPLE_DEFINITION_TYPES_FOR_SELECTOR = NO;
@@ -3852,7 +3851,6 @@
 					"DEBUG=1",
 					"$(inherited)",
 					HAVE_CONFIG_H,
-					"INTERNAL=1",
 				);
 				GCC_STRICT_ALIASING = NO;
 				GCC_WARN_MULTIPLE_DEFINITION_TYPES_FOR_SELECTOR = NO;
@@ -3914,8 +3912,6 @@
 					"$(inherited)",
 					HAVE_CONFIG_H,
 					"RELEASE=1",
-					"INTERNAL=1",
-					"DEBUG=1",
 				);
 				GCC_STRICT_ALIASING = NO;
 				GCC_WARN_MULTIPLE_DEFINITION_TYPES_FOR_SELECTOR = NO;

Signal.xcodeproj/xcshareddata/xcschemes/Signal-Internal.xcscheme

@@ -63,6 +63,18 @@
             ReferencedContainer = "container:Signal.xcodeproj">
          </BuildableReference>
       </BuildableProductRunnable>
+      <EnvironmentVariables>
+         <EnvironmentVariable
+            key = "INTERNAL"
+            value = ""
+            isEnabled = "YES">
+         </EnvironmentVariable>
+         <EnvironmentVariable
+            key = "DEBUG"
+            value = ""
+            isEnabled = "YES">
+         </EnvironmentVariable>
+      </EnvironmentVariables>
       <AdditionalOptions>
       </AdditionalOptions>
    </LaunchAction>