Remove typos and unused variables.

example/policy_ref_snip13.cpp

@@ -55,6 +55,7 @@ void test_cauchy()
    try
    {
       double d = mean(myspace::cauchy());  // Cauchy does not have a mean!
+      (void) d;
    }
    catch(const std::domain_error& e)
    {

example/root_elliptic_finding.cpp

@@ -107,7 +107,6 @@ const std::string full_roots_name(boost_root + "/libs/math/doc/roots/");
 
 const std::size_t nooftypes = 4;
 const std::size_t noofalgos = 4;
-const std::size_t noofroots = 3;
 
 double digits_accuracy = 1.0; // 1 == maximum possible accuracy.
 

example/root_finding_algorithms.cpp

@@ -131,8 +131,6 @@ std::vector<std::string> names; // short name.
 
 uintmax_t iters; // Global as iterations is not returned by rooting function.
 
-const int convert = 1000; // convert nanoseconds to microseconds (assuming this is resolution).
-
 const int count = 1000000; // Number of iterations to average.
  
 struct root_info

example/root_n_finding_algorithms.cpp

@@ -108,7 +108,6 @@ const std::string full_roots_name(boost_root + "/libs/math/doc/roots/");
 
 const std::size_t nooftypes = 4;
 const std::size_t noofalgos = 4;
-const std::size_t noofroots = 3;
 
 double digits_accuracy = 1.0; // 1 == maximum possible accuracy.
 

test/test_constants.cpp

@@ -764,7 +764,7 @@ void test_constexpr()
    (void)f3;
    (void) fval2;
    (void) dval2;
-   (voide) ldval2;
+   (void) ldval2;
 #ifdef BOOST_MATH_USE_FLOAT128
    constexpr __float128 f4 = boost::math::constants::pi<__float128>();
    (void)f4;