BUILD: Remove USE_TERMCONV related bits in port.mk.

We don't have any TERMCONV feature anymore, thus no need to keep this around.

ports.mk

@@ -156,19 +156,14 @@ ifdef USE_SPARKLE
 OSX_STATIC_LIBS += -framework Sparkle -F$(STATICLIBPATH)
 endif
 
-ifdef USE_TERMCONV
-OSX_ICONV ?= -liconv
-endif
-
 # Special target to create a static linked binary for Mac OS X.
 # We use -force_cpusubtype_ALL to ensure the binary runs on every
 # PowerPC machine.
 scummvm-static: $(OBJS)
 	$(CXX) $(LDFLAGS) -force_cpusubtype_ALL -o scummvm-static $(OBJS) \
 		-framework CoreMIDI \
 		$(OSX_STATIC_LIBS) \
-		$(OSX_ZLIB) \
-		$(OSX_ICONV)
+		$(OSX_ZLIB)
 
 # Special target to create a static linked binary for the iPhone
 iphone: $(OBJS)