Temporarily delete normative reference to Zfinx/Zdinx

Once ratified, we will provide nomenclature for the relationship
between vector extensions and Zfinx.  However, we'll need alternate
extension names: e.g., Zve32fx might correspond to Zfinx.

v-spec.adoc

@@ -5033,16 +5033,16 @@ All Zve* extensions support all vector permutation instructions
 (Section <<sec-vector-permute>>), except that Zve32x and Zve64x do not
 implement the floating-point scalar move instructions.
 
-The Zve32f and Zve64f extensions depend upon the F extension
-(or the proposed Zfinx extension), and implement all
+The Zve32f and Zve64f extensions depend upon the F extension,
+and implement all
 vector floating-point instructions (Section <<sec-vector-float>>) for
 floating-point operands with EEW=32 (i.e., no widening floating-point
 operations), and conversion instructions are provided to and from all
 supported integer EEWs.  Vector single-width floating-point reduction
 operations (<<sec-vector-float-reduce>>) for EEW=32 are supported.
 
-The Zve64d extension depends upon the D extension
-(or the proposed Zdinx extension), and implements all vector
+The Zve64d extension depends upon the D extension,
+and implements all vector
 floating-point instructions (Section <<sec-vector-float>>) for
 floating-point operands with EEW=32 or EEW=64 (including widening
 instructions and conversions between FP32 and FP64). Vector