want to remove status and subStatus from the given data ..

A very compact solution to your problem. Please check the documentation for a!keys(), a!update(), reduce(), merge() and apply().

The idea is to create a new map from scratch and copy only the required fields from the old map.

a!localVariables(
  local!data: {
      requestTypeId: {
        description: "Request Type Unique Identifier",
        type: "integer",
        questionSet: "global",
        required: true,
        typedesc: "Text"
      },
      automationId: {
        description: "Automat Recipe or Campaign Builder Id",
        type: "string",
        questionSet: "global",
        required: true,
        typedesc: "Text"
      },
      status: {
        description: "Automation Source",
        type: "integer",
        questionSet: "global",
        enum: { 157, 158, 159, 160, 161, 162, 163 },
        enumLabels: {
          "Automat",
          "Crossroads",
          "Member Web",
          "Public Directory",
          "Member App",
          "Provider Portal",
          "Faxblast"
        },
        typedesc: "Single-Select"
      },
      subStatus: {
        description: "Reported On Date / Time (format: YYYY-mm-DDTHH:MM:SS)",
        type: "string",
        questionSet: "global",
        typedesc: "Date and Time"
      },
      contactPhoneNumber: {
        description: "Contact Phone Number",
        type: "string",
        questionSet: "global",
        typedesc: "Text"
      },
      contactEmail: {
        description: "Contact Email",
        type: "string",
        questionSet: "global",
        typedesc: "Text"
      },
      dctLink: {
        description: "DCT Link",
        type: "string",
        questionSet: "global",
        typedesc: "Text"
      },
      insuranceMarket: {
        description: "Insurance Market",
        type: "string",
        questionSet: "global",
        enum: {
          "Individual",
          "Medicare Advantage",
          "Self Insured",
          "Small Group"
        },
        enumLabels: {
          "Individual",
          "Medicare Advantage",
          "Self Insured",
          "Small Group"
        },
        typedesc: "Single-Select"
      }
    },
  local!reducedFields: difference(a!keys(local!data), {"status", "subStatus"}),
  reduce(
    a!update(_,_,_),
    a!map(), /* Start with an empty list */
    merge( /* Create a list of tuples containing the field name and the field's value */
      local!reducedFields,
      apply(index(local!data,_,null), local!reducedFields)
    )
  )
)