Fix maths examples to match spec.

Bug: b:358007869
Change-Id: Ic48ac57688fb08ad2f1905bc935af1e6d603ac1c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5772135
Reviewed-by: Michael Cui <mlcui@google.com>
Commit-Queue: Darren Shen <shend@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1338899}

ash/picker/search/picker_math_search.cc

@@ -17,7 +17,8 @@ namespace ash {
 namespace {
 constexpr int kIconSize = 20;
 constexpr std::u16string_view kMathExamples[] = {
-    u"1 + 1", u"1/6 + 3/4", u"7^3", u"sqrt 1024", u"12 ft in m",
+    u"1/6 + 3/4",
+    u"12 ft in m",
 };
 }  // namespace