shader: drop duplicate num_interpis = 0

The top level emit_ios() already zeros it, so we can remove the
duplicate (and misleading) one in emit_ios_vs().

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-By: Gert Wollny <gert.wollny@collabora.com>

src/vrend_shader.c

@@ -5947,8 +5947,6 @@ static void emit_ios_vs(struct dump_ctx *ctx)
 {
    uint32_t i;
 
-   ctx->num_interps = 0;
-
    for (i = 0; i < ctx->num_inputs; i++) {
       char postfix[32] = "";
       if (!ctx->inputs[i].glsl_predefined_no_emit) {