Revert "Merge pull request #2381 from ehuss/update-pulldown-cmark"

This reverts commit 8884008b4d,
(https://github.com/rust-lang/mdBook/pull/2381) reversing
changes made to 3d6caa504f.

The `pulldown_cmark` types are a public API, which I did not realize.

Cargo.lock

@@ -1411,9 +1411,9 @@ dependencies = [
 
 [[package]]
 name = "pulldown-cmark"
-version = "0.11.0"
+version = "0.10.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8746739f11d39ce5ad5c2520a9b75285310dbfe78c541ccf832d38615765aec0"
+checksum = "76979bea66e7875e7509c4ec5300112b316af87fa7a252ca91c448b32dfe3993"
 dependencies = [
  "bitflags 2.5.0",
  "memchr",
@@ -1423,9 +1423,9 @@ dependencies = [
 
 [[package]]
 name = "pulldown-cmark-escape"
-version = "0.11.0"
+version = "0.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "007d8adb5ddab6f8e3f491ac63566a7d5002cc7ed73901f72057943fa71ae1ae"
+checksum = "bd348ff538bc9caeda7ee8cad2d1d48236a1f443c1fa3913c6a02fe0043b1dd3"
 
 [[package]]
 name = "quote"

Cargo.toml

@@ -27,7 +27,7 @@ handlebars = "5.0"
 log = "0.4.17"
 memchr = "2.5.0"
 opener = "0.7.0"
-pulldown-cmark = { version = "0.11.0", default-features = false, features = ["html"] }
+pulldown-cmark = { version = "0.10.0", default-features = false, features = ["html"] }
 regex = "1.8.1"
 serde = { version = "1.0.163", features = ["derive"] }
 serde_json = "1.0.96"

src/renderer/html_handlebars/search.rs

@@ -193,10 +193,7 @@ fn render_item(
                     body.push(' ');
                 }
             }
-            Event::Text(text)
-            | Event::Code(text)
-            | Event::InlineMath(text)
-            | Event::DisplayMath(text) => {
+            Event::Text(text) | Event::Code(text) => {
                 if in_heading {
                     heading.push_str(&text);
                 } else {