[numarray] Remove incorrect comments for deleted default constructors (cplusplus#8962)

Author: frederick-vs-ja

source/numerics.tex

@@ -8506,7 +8506,7 @@
     const slice_array& operator=(const slice_array&) const;
     void operator=(const T&) const;
 
-    slice_array() = delete;     // as implied by declaring copy constructor above
+    slice_array() = delete;
   };
 }
 \end{codeblock}
@@ -8788,7 +8788,7 @@
     const gslice_array& operator=(const gslice_array&) const;
     void operator=(const T&) const;
 
-    gslice_array() = delete;    // as implied by declaring copy constructor above
+    gslice_array() = delete;
   };
 }
 \end{codeblock}
@@ -8916,7 +8916,7 @@
     const mask_array& operator=(const mask_array&) const;
     void operator=(const T&) const;
 
-    mask_array() = delete;      // as implied by declaring copy constructor above
+    mask_array() = delete;
   };
 }
 \end{codeblock}
@@ -9033,7 +9033,7 @@
     const indirect_array& operator=(const indirect_array&) const;
     void operator=(const T&) const;
 
-    indirect_array() = delete;  // as implied by declaring copy constructor above
+    indirect_array() = delete;
   };
 }
 \end{codeblock}