Remove inadvertant parameters

Author: Derek Hower

arch/ext/Sm.yaml

@@ -471,34 +471,6 @@ Sm:
           The `misa` CSR is read-only-0.
       schema:
         type: boolean
-    MTVEC_BASE_VALUES:
-      description: |
-        The supported values in `mtvec.base`. 
-
-        Possible values:
-
-        none::
-          `mtvec.base` is read-only-zero.
-
-        width::
-          `mtvec.base` supports any value that fits in MTVEC_BASE_WIDTH bits
-
-        custom::
-          `mtvec.base` supports a custom set of values. Any attempt to read or write `mtvec.BASE` will
-          result in UNPREDICTABLE execution.
-      schema:
-        type: string
-        enum: [none, width, custom]
-    MTVEC_BASE_WIDTH:
-      description: |
-        When MTVEC_BASE_VALUES is 'width', the bit width of supported value in `mtvec.BASE`
-      schema:
-        type: integer
-        minimum: 1
-        maximum: 60
-      extra_validation: |
-        # max width is actually 30 for RV32
-        assert MTVEC_BASE_WIDTH <= 30 if MTVEC_BASE_VALUES == "width" && XLEN == 32
     MTVEC_MODES:
       description: |
         Modes supported by `mtvec.MODE`. If only one, it is assumed to be read-only with that value.