Remove duplicate keymap entry

Author: RoryO

examples/imgui_impl_x11.cpp

@@ -91,7 +91,6 @@ bool    ImGui_ImplX11_Init(xcb_connection_t *connection, xcb_drawable_t *win)
     io.KeyMap[ImGuiKey_Enter] = XK_Return - 0xFF00;
     io.KeyMap[ImGuiKey_Escape] = XK_Escape - 0xFF00;
     io.KeyMap[ImGuiKey_KeyPadEnter] = XK_KP_Enter - 0xFF00;
-    io.KeyMap[ImGuiKey_Space] = XK_space;
     io.KeyMap[ImGuiKey_A] = 'A';
     io.KeyMap[ImGuiKey_C] = 'C';
     io.KeyMap[ImGuiKey_V] = 'V';