unix: remove tk patches on macOS

These patches were added to avoid introducing symbols from
modern macOS SDKs because of linking issues when using an
older SDK.

With the investigation in indygreg/PyOxidizer#373
and the conclusion to require a minimum SDK version to relink, it
should be safe to introduce these symbols back into the binaries.

I'm pretty certain that the symbol mentioned inline is already
being pulled in by CPython 3.9 anyway. So these patches were
arguably already out of date before the aforementioned policy
change.

Author: indygreg

cpython-unix/build-tk.sh

@@ -12,90 +12,7 @@ export PKG_CONFIG_PATH=${TOOLS_PATH}/deps/share/pkgconfig:${TOOLS_PATH}/deps/lib
 
 tar -xf tk${TK_VERSION}-src.tar.gz
 
-pushd tk${TK_VERSION}
-
-if [ "${PYBUILD_PLATFORM}" = "macos" ]; then
-    # The @available annotations create missing symbol errors
-    # for ___isOSVersionAtLeast. We work around this by removing
-    # their use.
-    #
-    # This is not an ideal solution.
-    patch -p1 << EOF
-diff --git a/macosx/tkMacOSXColor.c b/macosx/tkMacOSXColor.c
-index 80b368f..b51796e 100644
---- a/macosx/tkMacOSXColor.c
-+++ b/macosx/tkMacOSXColor.c
-@@ -278,11 +278,9 @@ SetCGColorComponents(
-     OSStatus err = noErr;
-     NSColor *bgColor, *color = nil;
-     CGFloat rgba[4] = {0, 0, 0, 1};
--#if MAC_OS_X_VERSION_MAX_ALLOWED < 101400
-     NSInteger colorVariant;
-     static CGFloat graphiteAccentRGBA[4] =
- 	{152.0 / 255, 152.0 / 255, 152.0 / 255, 1.0};
--#endif
- 
-     if (!deviceRGB) {
- 	deviceRGB = [NSColorSpace deviceRGBColorSpace];
-@@ -373,16 +371,6 @@ SetCGColorComponents(
- 			  deviceRGB];
- 	    break;
- 	case 8:
--#if MAC_OS_X_VERSION_MAX_ALLOWED >= 101400
--	    if (@available(macOS 10.14, *)) {
--		color = [[NSColor controlAccentColor] colorUsingColorSpace:
--							  deviceRGB];
--	    } else {
--		color = [NSColor colorWithColorSpace: deviceRGB
--				 components: blueAccentRGBA
--				 count: 4];
--	    }
--#else
- 	    colorVariant = [[NSUserDefaults standardUserDefaults]
- 			       integerForKey:@"AppleAquaColorVariant"];
- 	    if (colorVariant == 6) {
-@@ -394,7 +382,6 @@ SetCGColorComponents(
- 				 components: blueAccentRGBA
- 				 count: 4];
- 	    }
--#endif
- 	    break;
- 	default:
- #if MAC_OS_X_VERSION_MAX_ALLOWED >= 101000
-diff --git a/macosx/tkMacOSXWm.c b/macosx/tkMacOSXWm.c
-index ceb3f3f..5c04f17 100644
---- a/macosx/tkMacOSXWm.c
-+++ b/macosx/tkMacOSXWm.c
-@@ -5928,12 +5928,6 @@ WmWinAppearance(
- 	    resultString = appearanceStrings[APPEARANCE_AUTO];
- 	} else if (appearance == NSAppearanceNameAqua) {
- 	    resultString = appearanceStrings[APPEARANCE_AQUA];
--#if MAC_OS_X_VERSION_MAX_ALLOWED >= 101400
--	} else if (@available(macOS 10.14, *)) {
--	    if (appearance == NSAppearanceNameDarkAqua) {
--		resultString = appearanceStrings[APPEARANCE_DARKAQUA];
--	    }
--#endif // MAC_OS_X_VERSION_MAX_ALLOWED >= 101400
- 	}
- 	result = Tcl_NewStringObj(resultString, strlen(resultString));
-     }
-@@ -5953,12 +5947,6 @@ WmWinAppearance(
- 		NSAppearanceNameAqua];
- 	    break;
- 	case APPEARANCE_DARKAQUA:
--#if MAC_OS_X_VERSION_MAX_ALLOWED >= 101400
--	    if (@available(macOS 10.14, *)) {
--		win.appearance = [NSAppearance appearanceNamed:
--		    NSAppearanceNameDarkAqua];
--	    }
--#endif // MAC_OS_X_VERSION_MAX_ALLOWED >= 101400
- 	    break;
- 	default:
- 	    win.appearance = nil;
-EOF
-fi
-
-pushd unix
+pushd tk${TK_VERSION}/unix
 
 CFLAGS="${EXTRA_TARGET_CFLAGS} -fPIC"
 LDFLAGS="${EXTRA_TARGET_LDFLAGS}"