Remove platform-tools from toolset (actions#3761)

* Platform-tools is installed along with any version of build-tools, there is no need to install it explicitly

Author: miketimofeev

images/linux/toolsets/toolset-1804.json

@@ -91,8 +91,7 @@
         ],
         "additional_tools": [
             "cmake;3.10.2.4988404",
-            "cmake;3.18.1",
-            "platform-tools"
+            "cmake;3.18.1"
         ],
         "ndk": {
             "lts": "21"

images/linux/toolsets/toolset-2004.json

@@ -87,8 +87,7 @@
         ],
         "additional_tools": [
             "cmake;3.10.2.4988404",
-            "cmake;3.18.1",
-            "platform-tools"
+            "cmake;3.18.1"
         ],
         "ndk": {
             "lts": "21",