Update web docs for Infrastructure.Email move (#289)

docs/web/diagrams/vertical-slice.md

@@ -99,7 +99,7 @@ see the notes for what else each of those foundation projects pulls in.
   - `Domain.Exceptions` (referenced by nearly every project directly, including
     all of `Shared.Contracts` and each feature slice)
   - `Infrastructure.Configuration` (the shared options-binding project
-    referenced by `Database.Connection`, `Infrastructure.Email`,
-    `Infrastructure.FileUpload`, and `Features.Emails` directly)
+    referenced by `Database.Connection`, `Infrastructure.FileUpload`,
+    and `Features.Emails` directly)
   - both are plumbing-level dependencies of nearly everything above, and drawing
     them would just add a second copy of the same fan-in

docs/web/diagrams/vertical-slice/project-references.mmd

@@ -25,7 +25,6 @@ subgraph INFRA["Slice-specific Infrastructure"]
 direction LR
 PwdHash["Infrastructure.PasswordHashing"]
 FileUpload["Infrastructure.FileUpload"]
-Email["Infrastructure.Email"]
 EmailTemplates["Infrastructure.Email.Templates"]
 end
 
@@ -36,5 +35,5 @@ LocationsSlice --> FOUNDATION
 BeersSlice --> FOUNDATION
 PhotoSlice --> FOUNDATION & FileUpload
 UsersSlice --> FOUNDATION & PwdHash
-EmailsSlice --> Email & EmailTemplates
+EmailsSlice --> EmailTemplates
 DBConn -- Dapper SQL, no ORM --> Tables[("SQL Server<br>Tables")]