win-capture: Remove unused static variables

plugins/win-capture/graphics-hook/gl-decs.h

@@ -119,14 +119,10 @@ static GLREADBUFFERPROC glReadBuffer = NULL;
 static GLDRAWBUFFERPROC glDrawBuffer = NULL;
 static GLGETINTEGERVPROC glGetIntegerv = NULL;
 static GLGETERRORPROC glGetError = NULL;
-static WGLSWAPLAYERBUFFERSPROC jimglSwapLayerBuffers = NULL;
-static WGLSWAPBUFFERSPROC jimglSwapBuffers = NULL;
-static WGLDELETECONTEXTPROC jimglDeleteContext = NULL;
 static WGLGETPROCADDRESSPROC jimglGetProcAddress = NULL;
 static WGLMAKECURRENTPROC jimglMakeCurrent = NULL;
 static WGLGETCURRENTDCPROC jimglGetCurrentDC = NULL;
 static WGLGETCURRENTCONTEXTPROC jimglGetCurrentContext = NULL;
-static WGLCREATECONTEXTPROC jimglCreateContext = NULL;
 static GLBUFFERDATAARBPROC glBufferData = NULL;
 static GLDELETEBUFFERSARBPROC glDeleteBuffers = NULL;
 static GLDELETETEXTURESPROC glDeleteTextures = NULL;