Remove references to sockets unit, now in rtl-extra package

rtl/aix/Makefile.fpc

@@ -48,7 +48,7 @@ libunits=$(SYSTEMUNIT) $(OBJPASUNIT) $(STRINGSUNIT) \
       $(DOSUNIT) \
       $(SYSUTILSUNIT) $(TYPINFOUNIT) $(MATHUNIT) \
       $(CPU_UNITS) $(GETOPTSUNIT) $(HEAPTRCUNIT) \
-      $(ERRORSUNIT) sockets
+      $(ERRORSUNIT)
 
 [prerules]
 RTL=..

rtl/android/Makefile.fpc

@@ -40,7 +40,7 @@ libunits=$(SYSTEMUNIT) $(OBJPASUNIT) $(STRINGSUNIT) $(DOSUNIT) \
       $(UNIXUNIT) $(BASEUNIXUNIT) $(UNIXTYPEUNIT) $(UNIXUTILUNIT) \
       $(SYSUTILSUNIT) $(TYPINFOUNIT) $(MATHUNIT) \
       $(CPU_UNITS) $(GETOPTSUNIT) \
-      $(ERRORSUNIT) sockets \
+      $(ERRORSUNIT) \
       $(SORTBASEUNIT) $(CLASSESUNIT) $(FGLUNIT) $(SYSCONSTUNIT) $(RTLCONSTSUNIT) \
 
 [prerules]

rtl/nativent/Makefile.fpc

@@ -18,7 +18,7 @@ implicitunits=ndk ndkutils ddk \
       $(TYPINFOUNIT) $(FGLUNIT) $(CLASSESUNIT) \
       $(CPU_UNITS) $(CHARSETUNIT) $(GETOPTSUNIT) \
       $(SOFTFPUUNIT) $(SFPUX80UNIT) $(UFLOATX80UNIT) $(SFPU128UNIT) $(UFLOAT128UNIT) \
-#      sockets printer \
+#      printer \
 #      keyboard
 #      sharemem exeinfo $(FPINTRESUNIT) \
       $(CP_UNITS)

rtl/palmos/Makefile.fpc

@@ -19,7 +19,7 @@ units=$(SYSTEMUNIT) si_prc $(UUCHARUNIT) $(OBJPASUNIT) $(ISO7185UNIT) $(STRINGSU
 #      $(RTLCONSTSUNIT) $(SYSCONSTUNIT) $(SYSUTILSUNIT) \
 #      $(TYPINFOUNIT) $(TYPESUNIT) $(FGLUNIT) $(CLASSESUNIT) \
 #      strutils convutils $(MATHUNIT) \
-#      $(CHARSETUNIT) $(CPALLUNIT) $(GETOPTSUNIT) winsock sockets
+#      $(CHARSETUNIT) $(CPALLUNIT) $(GETOPTSUNIT) winsock
 # $(INITCUNIT) $(CMEMUNIT) signals \
 #    wincrt winmouse winevent  printer \
 #    video mouse keyboard \