diff --git a/src/version.cc b/src/version.cc
index 182b8fd..6495626 100644
--- a/src/version.cc
+++ b/src/version.cc
@@ -1,127 +1,3 @@
 #include "version.h"
 
-#include <iosfwd>
 
-// Version represents a dotted version number, like "1.2.3.4", supporting
-// parsing and comparison.
-class Version {
- public:
-  // The only thing you can legally do to a default constructed
-  // Version object is assign to it.
-  Version();
-
-  Version(const Version& other);
-  Version(Version&& other);
-
-  Version& operator=(const Version& other) = default;
-  Version& operator=(Version&& other) = default;
-
-  // Initializes from a decimal dotted version number, like "0.1.1".
-  // Each component is limited to a uint32_t. Call IsValid() to learn
-  // the outcome.
-  explicit Version(std::string_view version_str);
-
-  ~Version();
-
-  // Compares two versions. Returns -1 for less than, 0 for equal to, and 1 for more than
-  int CompareVersions(const Version& verToCompare) const;
-
-  // Returns true if the object contains a valid version number.
-  bool IsValid() const;
-
-  // Return the string representation of this version.
-  std::string GetString() const;
-
-  const std::vector<uint32_t>& components() const { return components_; }
-
- private:
-  std::vector<uint32_t> components_;
-};
-
-bool operator==(const Version& v1, const Version& v2);
-bool operator<(const Version& v1, const Version& v2);
-bool operator<=(const Version& v1, const Version& v2);
-bool operator>(const Version& v1, const Version& v2);
-bool operator>=(const Version& v1, const Version& v2);
-std::ostream& operator<<(std::ostream& stream, const Version& v);
-
-Version::Version() = default;
-
-Version::Version(const Version& other) = default;
-
-Version::Version(Version&& other) = default;
-
-Version::~Version() = default;
-
-Version::Version(std::string_view version_str) {
-  std::vector<uint32_t> parsed;
-}
-
-// Compares version components in |components1| with components in
-// |components2|. Returns -1, 0 or 1 if |components1| is less than, equal to,
-// or greater than |components2|, respectively.
-int CompareVersionComponents(const std::vector<uint32_t>& components1,
-                             const std::vector<uint32_t>& components2) {
-  const size_t count = std::min(components1.size(), components2.size());
-  for (size_t i = 0; i < count; ++i) {
-    if (components1[i] > components2[i]) {
-      return 1;
-    }
-    if (components1[i] < components2[i]) {
-      return -1;
-    }
-  }
-  if (components1.size() > components2.size()) {
-    for (size_t i = count; i < components1.size(); ++i) {
-      if (components1[i] > 0) {
-        return 1;
-      }
-    }
-  } else if (components1.size() < components2.size()) {
-    for (size_t i = count; i < components2.size(); ++i) {
-      if (components2[i] > 0) {
-        return -1;
-      }
-    }
-  }
-  return 0;
-}
-
-int Version::CompareVersions(const Version& verToCompare) const {
-  return CompareVersionComponents(components_, verToCompare.components_);
-}
-
-bool Version::IsValid() const {
-  return (!components_.empty());
-}
-
-std::string Version::GetString() const {
-  if (!IsValid()) {
-    return "invalid";
-  }
-  return std::string();
-}
-
-bool operator==(const Version& v1, const Version& v2) {
-  return v1.CompareVersions(v2) == 0;
-}
-
-bool operator<(const Version& v1, const Version& v2) {
-  return v1.CompareVersions(v2) < 0;
-}
-
-bool operator<=(const Version& v1, const Version& v2) {
-  return v1.CompareVersions(v2) <= 0;
-}
-
-bool operator>(const Version& v1, const Version& v2) {
-  return v1.CompareVersions(v2) > 0;
-}
-
-bool operator>=(const Version& v1, const Version& v2) {
-  return v1.CompareVersions(v2) >= 0;
-}
-
-std::ostream& operator<<(std::ostream& stream, const Version& ver) {
-  return stream << ver.GetString();
-}