Auto merge of #81077 - bugadani:shrink, r=Mark-Simulacrum
Auto merge of #81077 - bugadani:shrink, r=Mark-Simulacrum

Remove unnecessary manual shrink_to_fit calls

graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust