build(eslint): drop the Z_RAW and EDGED_LABEL selectors

Both came out of the E28 claim audit (0521149c named z-levels, e13d93a3
static labels as flat Badges) after the audit itself had fixed the sites.
No real hit since: 0 matches in every lint run from E28 to E34 (S2/S3
measurement). Each still cost a probe test (zLayer.contract, the edged-label
half of hoverAndLink.contract) and a place in the gate snapshot. The design
rules stay in DESIGN.md (Tokens: no ad-hoc z-index; Static vs pressable),
with a decision-log row saying the selectors went and why.

frontend/src/lib/hoverAndLink.contract.test.ts

@@ -13,7 +13,6 @@ async function messages(source: string, starts: string): Promise<number> {
 const swaps = (src: string) => messages(src, "hover by a colour swap");
 const glyphs = (src: string) => messages(src, "a glyph-only <a>");
 const palette = (src: string) => messages(src, "a palette colour");
-const edged = (src: string) => messages(src, "a static label with an edge");
 
 describe("a hover by a colour swap", () => {
   // Assembled, so this file does not trip the very rule it probes.
@@ -74,36 +73,3 @@ describe("a palette colour", () => {
     expect(await palette(`export const g = "bg-accent text-danger border-border";\n`)).toBe(0);
   });
 });
-
-// F29: DESIGN.md "Static vs pressable": a label that does nothing is a flat Badge. A span drawn with a
-// rounded edge reads as a chip, gets clicked and does nothing (three sites and a private Badge had it).
-describe("a static label with an edge", () => {
-  const b = "border"; // assembled, as above
-
-  it("is refused, in a plain class and inside clsx", async () => {
-    const src = [
-      'import clsx from "clsx";',
-      "export const A = ({ on }: { on: boolean }) => (",
-      "  <>",
-      `    <span className="px-2 rounded-full ${b} ${b}-accent/40 text-accent">x</span>`,
-      `    <span className={clsx("rounded-lg ${b} ${b}-dashed", on && "text-accent")}>y</span>`,
-      "  </>",
-      ");",
-    ].join("\n");
-    expect(await edged(src)).toBe(2);
-  });
-
-  it("passes a flat tint, an edge on a non-label element, a span with no rounding, a drawn check mark", async () => {
-    const src = [
-      "export const B = () => (",
-      "  <>",
-      '    <span className="rounded-full bg-fg/8 text-muted">x</span>',
-      `    <div className="rounded-lg ${b} ${b}-border">y</div>`,
-      `    <span className="${b}-b ${b}-border">z</span>`,
-      `    <span className="grid h-3.5 w-3.5 rounded ${b}">✓</span>`,
-      "  </>",
-      ");",
-    ].join("\n");
-    expect(await edged(src)).toBe(0);
-  });
-});