Remove current Giga Device brand/families/targets from MbedCE (#507)

* Delete targets/TARGET_GigaDevice directory

* Remove GigaDevice targets

* Remove GigaDevice targets

* Remove TARGET_GigaDevice from CMakeLists

Removed TARGET_GigaDevice from the CMake build.

* Delete connectivity/drivers/emac/TARGET_GD_EMAC directory

* Remove GD_EMAC target from build configuration

Removed GD_EMAC target from CMakeLists.txt.

* Remove several board entries from database snapshot

Removed multiple board entries from the board database snapshot.

* Remove GD32 platform entries from database

Removed obsolete platform entries for GD32 series.

* Remove GigaDevices MCUs from greentea_cmake.yml

Removed GigaDevices MCUs from the workflow configuration.

* Add back LPCXpresso55S69 board to board database

Added back LPCXpresso55S69 board details to the database.

Author: JohnK1987

.github/workflows/greentea_cmake.yml

@@ -120,12 +120,6 @@ jobs:
           - target: EV_COG_AD4050LZ
             profile: full
 
-          # GigaDevices MCUs
-          - target: GD32_F307VG
-            profile: full
-          - target: GD32_F450ZI
-            profile: full
-
           # SiLabs MCUs
           - target: EFM32GG11_STK3701
             profile: full

connectivity/drivers/emac/CMakeLists.txt

@@ -20,8 +20,6 @@ elseif("Cypress" IN_LIST MBED_TARGET_LABELS)
     add_subdirectory(TARGET_Cypress)
 elseif("Freescale_EMAC" IN_LIST MBED_TARGET_LABELS)
     add_subdirectory(TARGET_Freescale_EMAC)
-elseif("GD_EMAC" IN_LIST MBED_TARGET_LABELS)
-    add_subdirectory(TARGET_GD_EMAC)
 elseif("NUVOTON_EMAC" IN_LIST MBED_TARGET_LABELS)
     add_subdirectory(TARGET_NUVOTON_EMAC)
 elseif("NXP_EMAC" IN_LIST MBED_TARGET_LABELS)