Remove is_prerelease declaration when not needed

Author: GuillaumeGomez

templates/crate/builds.html

@@ -18,7 +18,6 @@
   {%- set target = "" -%}
   {%- set inner_path = metadata.target_name_url() -%}
   {%- set is_latest_version = true -%}
-  {%- set is_prerelease = false -%}
   {%- include "rustdoc/topbar.html" -%}
 {%- endblock topbar -%}
 

templates/crate/details.html

@@ -12,7 +12,6 @@
 {%- block topbar -%}
   {%- set inner_path = metadata.target_name_url() -%}
   {%- set is_latest_version = true -%}
-  {%- set is_prerelease = false -%}
   {%- include "rustdoc/topbar.html" -%}
 {%- endblock topbar -%}
 

templates/crate/features.html

@@ -14,7 +14,6 @@
   {%- set target = "" -%}
   {%- set inner_path = metadata.target_name_url() -%}
   {%- set is_latest_version = true -%}
-  {%- set is_prerelease = false -%}
   {%- include "rustdoc/topbar.html" -%}
 {%- endblock topbar -%}
 

templates/crate/source.html

@@ -10,7 +10,6 @@
   {%- set target = "" -%}
   {%- set inner_path = metadata.target_name_url() -%}
   {%- set is_latest_version = true -%}
-  {%- set is_prerelease = false -%}
   {%- include "rustdoc/topbar.html" -%}
 {%- endblock topbar -%}
 

templates/rustdoc/topbar.html

@@ -194,7 +194,7 @@
         {%- if yanked -%}
             {%- set tooltip = "You are seeing a yanked version of the {} crate. Click here to go to the latest version."|format(metadata.name) -%}
             {%- set title = "This release has been yanked, go to latest version" -%}
-        {%- elif is_prerelease -%}
+        {%- elif is_prerelease is defined && is_prerelease -%}
             {%- set tooltip = "You are seeing a pre-release version of the {} crate. Click here to go to the latest stable version."|format(metadata.name) -%}
             {%- set title = "Go to latest stable release" -%}
         {%- else -%}