[lldb] NFC remove DISALLOW_COPY_AND_ASSIGN

Summary:
This is how I applied my clang-tidy check (see
https://reviews.llvm.org/D80531) in order to remove
`DISALLOW_COPY_AND_ASSIGN` and have deleted copy ctors and deleted
assignment operators instead.

```
lang=bash
grep DISALLOW_COPY_AND_ASSIGN /opt/notnfs/kkleine/llvm/lldb -r -l | sort | uniq > files

for i in $(cat files);
do
  clang-tidy \
    --checks="-*,modernize-replace-disallow-copy-and-assign-macro" \
    --format-style=LLVM \
    --header-filter=.* \
    --fix \
    -fix-errors \
    $i;
done
```

Reviewers: espindola, labath, aprantl, teemperor

Reviewed By: labath, aprantl, teemperor

Subscribers: teemperor, aprantl, labath, emaste, sbc100, aheejin, MaskRay, arphaman, usaxena95, lldb-commits

Tags: #lldb

Differential Revision: https://reviews.llvm.org/D80543

1 files changed, 8 insertions, 4 deletions

diff --git a/lldb/source/Commands/CommandCompletions.cpp b/lldb/source/Commands/CommandCompletions.cpp
index 11198f6..48df773 100644
--- a/lldb/source/Commands/CommandCompletions.cpp
+++ b/lldb/source/Commands/CommandCompletions.cpp
@@ -97,7 +97,8 @@ protected:
   CompletionRequest &m_request;
 
 private:
-  DISALLOW_COPY_AND_ASSIGN(Completer);
+  Completer(const Completer &) = delete;
+  const Completer &operator=(const Completer &) = delete;
 };
 } // namespace
 
@@ -154,7 +155,8 @@ private:
   const char *m_file_name;
   const char *m_dir_name;
 
-  DISALLOW_COPY_AND_ASSIGN(SourceFileCompleter);
+  SourceFileCompleter(const SourceFileCompleter &) = delete;
+  const SourceFileCompleter &operator=(const SourceFileCompleter &) = delete;
 };
 } // namespace
 
@@ -226,7 +228,8 @@ private:
   typedef std::set<ConstString> collection;
   collection m_match_set;
 
-  DISALLOW_COPY_AND_ASSIGN(SymbolCompleter);
+  SymbolCompleter(const SymbolCompleter &) = delete;
+  const SymbolCompleter &operator=(const SymbolCompleter &) = delete;
 };
 } // namespace
 
@@ -273,7 +276,8 @@ private:
   const char *m_file_name;
   const char *m_dir_name;
 
-  DISALLOW_COPY_AND_ASSIGN(ModuleCompleter);
+  ModuleCompleter(const ModuleCompleter &) = delete;
+  const ModuleCompleter &operator=(const ModuleCompleter &) = delete;
 };
 } // namespace