Remove CPU usage example from CI build

Author: rajkan01

tools/test/examples/examples.json

@@ -220,22 +220,6 @@
         "compare_log": ["mbed-os-example-sys-info/tests/sys-info.log"],
         "auto-update" : true
     },
-    {
-        "name": "mbed-os-example-cpu-usage",
-        "github":"https://github.com/ARMmbed/mbed-os-example-cpu-usage",
-        "sub-repo-example": false,
-        "subs": [],
-        "features" : [],
-        "targets" : ["NUCLEO_F429ZI", "FVP_MPS2_M3"],
-        "toolchains" : [],
-        "exporters": [],
-        "compile" : true,
-        "export": true,
-        "test" : true,
-        "baud_rate": 9600,
-        "compare_log": ["mbed-os-example-cpu-usage/tests/cpu-usage.log"],
-        "auto-update" : true
-    },
     {
         "name": "mbed-os-example-cpu-stats",
         "github":"https://github.com/ARMmbed/mbed-os-example-cpu-stats",