updated the platform_whitelist section for multiple examples

Author: Bhaskar VishnuVardhan Chebrolu

host/copy_buffer/description.json

@@ -14,9 +14,6 @@
     "key_concepts": [
         "Copy Buffer"
     ], 
-    "platform_whitelist": [
-        "u280"
-    ],
     "platform_blacklist": [
         "xilinx_u200_xdma_201830",
         "xilinx_u250_xdma_201830",

host/p2p_fpga2fpga/description.json

@@ -17,9 +17,6 @@
     "os": [
         "Linux"
     ],
-    "platform_whitelist": [
-        "samsung_u2"
-    ],
     "platform_blacklist": [
         "zc",
         "201910",

host/p2p_simple/description.json

@@ -20,9 +20,6 @@
     "os": [
         "Linux"
     ],
-    "platform_whitelist": [
-        "samsung_u2"
-    ],
     "platform_blacklist": [
         "zc",
         "_u25_",

library_examples/MCEuropeanEngine/description.json

@@ -7,8 +7,7 @@
     "flow": "vitis", 
     "platform_type": "pcie", 
     "platform_whitelist": [
-        "aws-vu9p-f1",
-        "u250"
+        "aws-vu9p-f1"
     ], 
     "platform_blacklist": [
         "_u25_",

library_examples/gemm/description.json

@@ -6,8 +6,7 @@
     "flow": "vitis", 
     "platform_type": "pcie", 
     "platform_whitelist": [
-        "aws-vu9p-f1",
-        "u200"
+        "aws-vu9p-f1"
     ], 
     "platform_blacklist": [
         "u25",

library_examples/gzip_app/description.json

@@ -5,8 +5,7 @@
     ], 
     "flow": "vitis", 
     "platform_whitelist": [
-        "aws-vu9p-f1",
-        "u200"
+        "aws-vu9p-f1"
     ], 
     "platform_blacklist": [
         "zc",

library_examples/transp/description.json

@@ -6,8 +6,7 @@
     "flow": "vitis",
     "platform_type": "pcie", 
     "platform_whitelist": [
-        "aws-vu9p-f1",
-        "u200"
+        "aws-vu9p-f1"
     ],
     "platform_blacklist": [
         "zc",