-extern void setLevelInfoToDefaults_SP(void);
-extern void copyInternalEngineVars_SP(void);
-extern boolean LoadNativeLevel_SP(char *, int, boolean);
-extern void SaveNativeLevel_SP(char *);
+void setLevelInfoToDefaults_SP(void);
+void copyInternalEngineVars_SP(void);
+boolean LoadNativeLevel_SP(char *, int, boolean);
+void SaveNativeLevel_SP(char *);