codebase: Remove web frontend and related services (#2067)

* codebase: Remove web frontend and related services

* refactor: Update StartPPROF to accept context and adjust related tests

* refactor: Simplify SetIfZero functions and update related tests

* config: Clarify DowngradeConfig method documentation regarding permanent removal of deprecated fields

* refactor: Rename setIfZeroAndWarn to setDefaultIfZeroWarn for clarity and update related calls

* refactor: Update error handling in DataHistoryManager and remove redundant error variable

config_example.json

@@ -72,7 +72,9 @@
  },
  "profiler": {
   "enabled": false,
-  "mutex_profile_fraction": 0
+  "mutex_profile_fraction": 0,
+  "listen_address": "localhost:8085",
+  "block_profile_rate": 0
  },
  "ntpclient": {
   "enabled": 0,
@@ -207,17 +209,6 @@
    "grpcProxyEnabled": false,
    "grpcProxyListenAddress": "localhost:9053",
    "timeInNanoSeconds": false
-  },
-  "deprecatedRPC": {
-   "enabled": true,
-   "listenAddress": "localhost:9050"
-  },
-  "websocketRPC": {
-   "enabled": true,
-   "listenAddress": "localhost:9051",
-   "connectionLimit": 1,
-   "maxAuthFailures": 3,
-   "allowInsecureOrigin": true
   }
  },
  "portfolioAddresses": {