diff --git a/Common/Data/Convert/ColorConv.cpp b/Common/Data/Convert/ColorConv.cpp
index 55686f5c00..01c434e6e5 100644
--- a/Common/Data/Convert/ColorConv.cpp
+++ b/Common/Data/Convert/ColorConv.cpp
@@ -34,88 +34,6 @@
 #endif
 #endif
 
-// convert 4444 image to 8888, parallelizable
-void convert4444_gl(u16* data, u32* out, int width, int l, int u) {
-	for (int y = l; y < u; ++y) {
-		for (int x = 0; x < width; ++x) {
-			u32 val = data[y*width + x];
-			u32 r = ((val >> 12) & 0xF) * 17;
-			u32 g = ((val >> 8) & 0xF) * 17;
-			u32 b = ((val >> 4) & 0xF) * 17;
-			u32 a = ((val >> 0) & 0xF) * 17;
-			out[y*width + x] = (a << 24) | (b << 16) | (g << 8) | r;
-		}
-	}
-}
-
-// convert 565 image to 8888, parallelizable
-void convert565_gl(u16* data, u32* out, int width, int l, int u) {
-	for (int y = l; y < u; ++y) {
-		for (int x = 0; x < width; ++x) {
-			u32 val = data[y*width + x];
-			u32 r = Convert5To8((val >> 11) & 0x1F);
-			u32 g = Convert6To8((val >> 5) & 0x3F);
-			u32 b = Convert5To8((val)& 0x1F);
-			out[y*width + x] = (0xFF << 24) | (b << 16) | (g << 8) | r;
-		}
-	}
-}
-
-// convert 5551 image to 8888, parallelizable
-void convert5551_gl(u16* data, u32* out, int width, int l, int u) {
-	for (int y = l; y < u; ++y) {
-		for (int x = 0; x < width; ++x) {
-			u32 val = data[y*width + x];
-			u32 r = Convert5To8((val >> 11) & 0x1F);
-			u32 g = Convert5To8((val >> 6) & 0x1F);
-			u32 b = Convert5To8((val >> 1) & 0x1F);
-			u32 a = (val & 0x1) * 255;
-			out[y*width + x] = (a << 24) | (b << 16) | (g << 8) | r;
-		}
-	}
-}
-
-// convert 4444 image to 8888, parallelizable
-void convert4444_dx9(u16* data, u32* out, int width, int l, int u) {
-	for (int y = l; y < u; ++y) {
-		for (int x = 0; x < width; ++x) {
-			u32 val = data[y*width + x];
-			u32 r = ((val >> 0) & 0xF) * 17;
-			u32 g = ((val >> 4) & 0xF) * 17;
-			u32 b = ((val >> 8) & 0xF) * 17;
-			u32 a = ((val >> 12) & 0xF) * 17;
-			out[y*width + x] = (a << 24) | (b << 16) | (g << 8) | r;
-		}
-	}
-}
-
-// convert 565 image to 8888, parallelizable
-void convert565_dx9(u16* data, u32* out, int width, int l, int u) {
-	for (int y = l; y < u; ++y) {
-		for (int x = 0; x < width; ++x) {
-			u32 val = data[y*width + x];
-			u32 r = Convert5To8((val)& 0x1F);
-			u32 g = Convert6To8((val >> 5) & 0x3F);
-			u32 b = Convert5To8((val >> 11) & 0x1F);
-			out[y*width + x] = (0xFF << 24) | (b << 16) | (g << 8) | r;
-		}
-	}
-}
-
-// convert 5551 image to 8888, parallelizable
-void convert5551_dx9(u16* data, u32* out, int width, int l, int u) {
-	for (int y = l; y < u; ++y) {
-		for (int x = 0; x < width; ++x) {
-			u32 val = data[y*width + x];
-			u32 r = Convert5To8((val >> 0) & 0x1F);
-			u32 g = Convert5To8((val >> 5) & 0x1F);
-			u32 b = Convert5To8((val >> 10) & 0x1F);
-			u32 a = ((val >> 15) & 0x1) * 255;
-			out[y*width + x] = (a << 24) | (b << 16) | (g << 8) | r;
-		}
-	}
-}
-
 void ConvertBGRA8888ToRGBA8888(u32 *dst, const u32 *src, u32 numPixels) {
 #ifdef _M_SSE
 	const __m128i maskGA = _mm_set1_epi32(0xFF00FF00);
diff --git a/Common/Data/Convert/ColorConv.h b/Common/Data/Convert/ColorConv.h
index a7355dbb9d..53a286d127 100644
--- a/Common/Data/Convert/ColorConv.h
+++ b/Common/Data/Convert/ColorConv.h
@@ -126,15 +126,6 @@ inline u16 RGBA8888ToRGBA444X(u32 value) {
 	return r | g | b;
 }
 
-// convert image to 8888, parallelizable
-// TODO: Implement these in terms of the conversion functions below.
-void convert4444_gl(u16* data, u32* out, int width, int l, int u);
-void convert565_gl(u16* data, u32* out, int width, int l, int u);
-void convert5551_gl(u16* data, u32* out, int width, int l, int u);
-void convert4444_dx9(u16* data, u32* out, int width, int l, int u);
-void convert565_dx9(u16* data, u32* out, int width, int l, int u);
-void convert5551_dx9(u16* data, u32* out, int width, int l, int u);
-
 // "Complete" set of color conversion functions between the usual formats.
 
 // TODO: Need to revisit the naming convention of these. Seems totally backwards